The Photon operating system must configure Secure Shell (SSH) to ignore user-specific known_host files.
An XCCDF Rule
Description
SSH trust relationships enable trivial lateral spread after a host compromise and therefore must be explicitly disabled. Individual users can have a local list of trusted remote machines, which must also be ignored while disabling host-based authentication generally.
- ID
- SV-258881r935567_rule
- Version
- PHTN-40-000218
- Severity
- Medium
- References
- Updated
Remediation Templates
A Manual Procedure
Navigate to and open:
/etc/ssh/sshd_config
Ensure the "IgnoreUserKnownHosts" line is uncommented and set to the following: